CN107078492B - Electrical tubular insulator for high voltage transmission line - Google Patents
Electrical tubular insulator for high voltage transmission line Download PDFInfo
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- CN107078492B CN107078492B CN201480080848.8A CN201480080848A CN107078492B CN 107078492 B CN107078492 B CN 107078492B CN 201480080848 A CN201480080848 A CN 201480080848A CN 107078492 B CN107078492 B CN 107078492B
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- conductive layer
- tubular insulator
- electrical
- support tube
- layer
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
- H02G3/0468—Corrugated
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Insulating Bodies (AREA)
Abstract
For the flexibility used in high voltage power transmission and flexible electrical tubular insulator (1).Electrical insulator (1) has the conductive carrier pipe (4) covered by the first conductive layer (5), electric insulation layer (6) and the second conductive layer (7).First conducting shell (5) and insulating layer (6) are pressed on support tube (4) by co-extrusion pressure co-extrusion, so that insulating layer (6) is arranged in radial directions between the first conducting shell (5) and the second conducting shell (7), and the first conducting shell (5) is made to be electrically connected to support tube (4), wherein the first conducting shell is attached to electric insulation layer, and wherein electric insulation layer is attached to the second conducting shell.
Description
Technical field
The present invention relates to can so as to form high voltage transmission line designed for receiving at least one non-insulated electric conductor section of electricity
Bending and therefore electrical tubular insulator flexible, the method for producing such electrical tubular insulator and include that such tubulose electricity is exhausted
The high voltage transmission line of edge body.High voltage transmission line is possibly used for installing in land, for example, as buried cable, or as such as seabed
Cable.
Background technique
Connection such as large-sized solar field, Ruo Gansuo are required for for long distance powedr transmission or the development of the technology of distribution
The wind field or large hydropower station of connection and suchlike long-range renewable power generating equipment are to some hinge (hub).For example, in wind
In the case where, several generators are to hinge feed power, it is directed into for further use on the bank therefrom.Existing
In technology, electrical power of the capacity higher than 3 GW, which is transmitted, is normally limited to overhead line due to economic cause.
Capacity is more than that the current high-capacity power high-voltage transmission of 2 GW is limited to overhead line and can undertake as only economy
Selection.However, pass through in high voltage overhead transmission line close to compact settlement, or in the case where pass through in it, they are made
At vision, electropollution and electromagnetic pollution.Since the public objection of growth builds new frame in Europe and U.S.'s most area
Empty hv transmission line (AC and DC) becomes almost impossible.Public utilities, which are faced with, cannot obtain required right-of-way license
Problem, such as, it is desirable that channel it is too big in compact settlement or there is high land price.About high-pressure system in rules and regulations
The variations of planning extensions strengthen the interest to the alternatives using underground transmission line as overhead line.In addition, in the future
The seabed solution that will look for novelty of intercontinental high capacity transmission.Existing underground and undersea technology are controlled by cable technology
(dominate), and due to conductor sizes, insulation thickness and transport limitation, scaling up upwards is to have challenge.
Due to that, there is the demand of the rising for underground and underwater power cable for transmitting electrical power.
For example, US 5043538 describes a kind of water-impervious cable construction, it includes center electrical conductors, the insulating materials of such as plastics
Coating, the shielded layer formed by multiple respective conductors, wherein shielded layer is in semiconducting material, overlapping moisture barrier gold
In the other coating for belonging to the foil bed of material and insulating materials.
Unfortunately, hold in such power cable that several hundred kilovolts of high-voltage applications of high current specially require to more high-transmission
Amount only scales up and limit by inner conductor size and cable insulation thickness, so that such cable volume is very big and pole
Weight, so that it is almost unusable in processes.If electric field will remain in proper to allow in reasonable boundary
Processing, then higher voltage requires to increase the thickness of electrical power cable insulation.Higher electric current, which usually requires that, increases electrical power electricity
The global sections of the practical conductor area of the internal conductance body of cable, or the material of higher conductivity is required for internal electricity
Conductor and thicker cable insulation.
The described huge and weight limitation of such ordinary power cable to scale up will cause between A point and B point
Establish the increased quantity of cut cable required for power line.Increased number of cut cable requires at a large amount of cable splice, this
A little joints are not still laborious for the transmission line for establishing economy between A point and B point and are harmful.
Present inventor developed for realizing what electrical power of the capacity higher than 3 GW was transmitted by high voltage transmission line
Economic solution, compared with ordinary power cable system, which does not require excessive engagement between A point and B point
Place.In brief, solution is to produce electrical tubular insulator independently of electric conductor section first, secondly, it is mutually indepedent
Actual installation point, and third are transported, it is all by the way that at least one non-insulated electric conductor section of electricity to be inserted into actual installation point
In the electrical tubular insulator as disclosed in the PCT/EP2014/052390 submitted as same Applicant, assemble them into it is high or in
Press power transmission line.The full content of PCT/EP2014/052390 is incorporated herein by reference, specifically, disclosed part
Be related to electrical tubular insulator and conductor segment individually produce and its to installation point independent transport, in installation point, they are assembled
To form high voltage transmission line (for example, being coiled on reel for transporting).In other words, electric insulation component and practical conductor component
Separation overcome the transport limitation of such as weight or size, allow higher cross-sectional area of conductor and final higher transmission capacity,
Without damaging whole segment length.
This allows the area of section of the increase of conductor, and therefore allows to reach every route 3GW(in bipolar operation
For 6 GW) or even higher high energy transmission capacity.
However, one of the significant challenge of concept of the invention disclosed in PCT/EP2014/052390 is that manufacture is suitble to soft
Property insulation tube.The principle of brief review, PCT/EP2014/052390 can be summarized as follows:
1. by increasing conductive cross-section area, and high voltage " moderate " is kept compared with conventional high-pressure power transmission cable,
Increase current carrying capacities,
2. it is in its corresponding manufacture state that the tubulose electrical isolation of solid is separately manufactured with conductor stranded wire (strand),
It is achieved in longer section more than 300 meters, and thus reduces the joint of the high voltage transmission line of the GW transmitted according to every km
Quantity.
The bending attribute of electrical tubular insulator allows to be up to the transport of several hundred meters of segment length on reel.Correspondingly,
This is equally genuine at least one conductor segment.Such coiling on reel requires reference standard electric cable transporting reel most
The clear degree of flexibility of big routine size.
It is understood to according to the electrical tubular insulator of PCT/EP2014/052390 application for once multiple electric conductor section quilts
It is inserted into electrical tubular insulator, just forms the tubulose electric insulation arrangement of high voltage transmission line arrangement, wherein electrical tubular insulator is
It is flexible, the flexibility in terms of flexible, once and including being inserted into tubular-shaped electric conductors for electric conductor section, just establish
To the internal circumference conductive layer of its electrical contact.In addition, electrical tubular insulator can make electric conductor section once be inserted into tubulose electricity
In insulator, just with the external electrical insulation of tubulose electric insulation arrangement, for example, with earth potential insulate.
Conductor segment and tubulose electrical isolation transport individually the actual installation point of high voltage transmission line.It is a other unassembled as a result,
Component transport is lighter, and hauled weight limitation (for example, 32 tons that are used for road transport) reaches in more much longer segment length.
For example, it will require to put down if will be in the voltage of 320 kV using the power of 3 GW of normal cable technology transfer
5 capable high-tension cables are to obtain enough conduction surfaces.This this exemplary power transmission line can replace five normal cables, make
Novel power transmission line particularly suitable for the large capacity transmission in urban district, in urban district, partly under may become in the recent period through
Ji, and there is unsatisfactory limited transmission capacity in urban district conventional extrusion cable.
Therefore, the production cost for establishing power transmission line is not only reduced, and is reduced for according to PCT/EP2014/
The space of the requirement of the cable duct of 052390 power transmission line.Just in case the transmission line capability between A point and B point should be more than single transmission
The maximum transmission line capability of line, then a plurality of power transmission line can be mutually provided side by side in cable duct.
Summary of the invention
By the invention solves first be designed to provide for establishing the suitable flexible and flexible of high voltage transmission line
Electrical tubular insulator.Term " flexibility " is understood to be not only multiduty in use but also in terms of flexible.
Second purpose is to be promoted for manufacturing electrical tubular insulator, and formation is used to form the important of such high voltage transmission line
The method of element.
Third purpose is to promote the high voltage transmission line including such suitable electrical tubular insulator.
Term " high pressure " should be interpreted as specified or nominal higher than at least 1 kV in the mode of operation of power transmission line below
Voltage, but term " high pressure " is frequently used for the nominal voltage higher than 50 kV, and term " middle pressure " is frequently used in 1 kV and 50
Nominal voltage between kV.
The present invention is especially economical for the high voltage transmission line at least nominal voltage of 320kV.
Term " high voltage transmission line " not only should be understood to be limited to be capable of providing for example from the effective electricity for being applied to its inner surface
The power transmission line that gesture (live potential) to the lasting of the earth potential for being applied to its outer surface and is reliably electrically insulated, and
Include the power transmission line of the high current of such as such as 5000 amperes of carrying.
Term " transmission of electricity " be interpreted as permanently transport AC and DC electrical power ability, that is, within phase long period without
Only moment, in interphase in short-term, such as discharge lightning strike (lightning stroke), fault current or it is all so
Class.
First purpose passes through for receiving electric conductor flexible with lower region feature and therefore tubulose electricity flexible is exhausted
Edge body and be achieved.In most basic embodiment, electrical tubular insulator is along the longitudinal axis defined by its tubulose global shape
It is flexible and is therefore flexible, and the conduction including being covered by the first conductive layer, electric insulation layer and the second conductive layer
Support tube.First conductive layer and insulating layer co-extrusion is pressed onto support tube.The second conductive layer is applied in electric insulation layer outer radial, so that
Insulating layer is arranged between the first conductive layer and the second conductive layer in radial directions relative to longitudinal axis, and makes first
Conductive layer is attached to electric insulation layer, and electric insulation layer is made to be attached to the second conductive layer.First conductive layer is electrically connected to support tube.
Insulating materials for electric insulation layer must endure as at least maximum field between first and second conductive layer.
Electric field is not constant in radial directions relative to longitudinal axis.Due to reduced joint curvature, electric field is in the first conduction
The radial engagement of layer to electric insulation layer is maximum everywhere and minimum everywhere in the radial engagement of the second conductive layer to electric insulation layer.
In the present context, term " at radial engagement " is understood to relative to longitudinal axis, layer it is radially connected.Average electric field is to be situated between
Value between described two radial engagements.For example, 550 kV extruded cables are with the maximum field of 33kV/mm, 14kV/mm
Field minimum, and mean field is about 21 kV/mm.
Due at the radial engagement of the second conductive layer of radially outer to by impurity and gap generation inhomogeneity not
It is too sensitive, therefore, it is possible to allow the second conductive layer application between the first conductive layer and the co-extrusion pressure of electric insulation layer
Time delay.
Term " co-extrusion pressure " should not be from understanding, so that the extruding of the first conductive layer and insulating layer is needed with quite tight in the narrow sense
At the time of the mode of lattice is in identical simultaneously.Term " co-extrusion pressure " should functionally understand, because it also includes tubulose electricity
Insulator, the first conductive layer and insulating layer squeeze for continuous one on the other side but in limited time quantum, allow
Extremely cleaning and stable process.What the requirement in terms of the maximum quantity in cleannes and gap was intended for high voltage transmission line
Nominal voltage and change.Compared with if high voltage transmission line will be used to carry and be higher than the such as nominal voltage of 300 kV, if high
Pressure power transmission line will be used to carry the nominal voltage less than such as 50 kV, then for electric insulation layer to be applied to the first conductive layer
Time delay is much larger.It therefore, can be in the above situation for the nominal voltage less than 50 kV by individual extrusion process
Electric insulation layer is applied on the first conductive layer, and very preferably in the above situation of the nominal voltage for 300 kV
It is low time delay sinking as far as possible between the first conductive layer will to be applied in electric insulation layer, for example, being lower than 10 seconds, be used for this to meet
The insulating requirements of kind voltage.
Once being mounted, support tube is mentioned when electrical tubular insulator is by the external mechanical force acted on high voltage transmission line
For the abundant mechanical dimension internal for it and shape stability.Support tube is not only served as protecting conductor segment from from pipe
The mechanical set of undesirable mechanical shock of the environment of shape electrical insulator, and pass through its shape stability, it is ensured that adequately
Section is guaranteed, is led so that at least one electricity does not insulate after the manufacture electrical tubular insulator when forming actual high-voltage power transmission line
Body section is inserted into electrical tubular insulator.Its initial given shape and section for keeping support tube are advantageous form, because it
The group eliminated in power transmission line decorates place to any need of its geometry shaping, and is therefore convenient at least one conductor segment
Insertion.Term " conductor segment " will not be considered limited to geometry in particular, for example, seeming in the section of whole conductor
The section of Shi Quanyuan is inserted into electrical tubular insulator.Opposite to that, term conductor section is interpreted as transmitting the whole of high-voltage power
The element or component of the nominal conductor of body.Since the flexible of conductor segment reduces with its section is increased, current power transmission
Line will include the multiple conductors substantially run on the identical longitudinal direction defined by power transmission line in most of embodiments
Section, for ensuring the desired degree of flexibility in the number of turns (turn) of the flexible ratio of the outer diameter to electrical tubular insulator.
When at least one non-insulated electric conductor section of electricity to be inserted into electrical tubular insulator, it also functions as at least one conductor
The guide member of section.In the mode of operation of high-voltage power line, support tube is also established in place intracavitary at least one in the inner and is led
The reliable and lasting electrical connection of body section.
First conductive layer ensures the electric field occurred from the electric conductor section of at least one insertion in the operation shape of high voltage transmission line
It is smoothed in state and uniformly, and electric insulation layer is provided for being inserted into electrical tubular insulator extremely after manufacturing electrical tubular insulator
The abundant electrical isolation of a few uninsulated conductor segment of electricity, to guard against outside or the environment of electrical tubular insulator, for example, defence ground
Potential.
Second conductive layer ensure the electric field in electric insulation layer further smoothed in the mode of operation of high voltage transmission line and
Uniformly.Therefore, the first and second conductive layers essentially contribute to that high voltage transmission line is controlled and be distributed in the mode of operation of the latter
In electric field.With in insulating layer and compared with the radial engagement of the first conductive layer electric field everywhere, due to radial engagement
The lower curvature at place, in insulating layer and lower with the electric field of the radial engagement of the second conductive layer everywhere.
By the way that the first conductive layer and electric insulation layer are applied in support tube via co-extrusion pressure, it is ensured that in the first conductive layer
Substantially without any gap at the first radial engagement between insulating layer.Although known gap is to the insulating matter of any power transmission line
Amount is particularly detrimental, but partial discharge requirement and/or resistance due to enhancing, avoids such gap to any high voltage transmission line
It is especially important.The radial engagement between the first conductive layer and insulating layer in the presence of most High-Field that avoids in space is special everywhere
Crucial.
In addition, co-extrusion pressure allows between two adjacent layers, specifically between the first conductive layer and insulating layer, and
And if be required, also between the second conductive layer that support tube circumference extends, exist opposite to each other in axis longitudinally in each
Especially close adhesion in terms of splendid bonding.There is such close bonding to prevent layer in electrical tubular insulator between layers
Layering during bending, and therefore also prevent the formation in gap.In addition, co-extrusion process ensures between the different layers, tool
The impurity of such as grit is not present in sensitive interface for body between the first conductive layer and insulating layer.
In the more low voltage range of the high-voltage power line, the first conductive layer and insulating layer is coextruded, and second leads
Electric layer can then during squeeze, if therefore include in the first conductive layer compared with the interface between insulation,
The minimum joint in field.
To realize even more preferably shielding with more homogeneous for electric field compared with only with the first conductive layer, recommends second to the utmost and lead
Electric layer squeezes on the insulating layer.
There is the superior isolation quality of the high voltage transmission line of the high-voltage applications more than 300 kV AC nominal voltages for realization,
Preferably the second conductive layer is applied on electric insulation layer via three layers of extrusion process.The process of the type ensures the first conduction
The at about extruding of layer, insulating layer and the second conductive layer.
As such as being carried out in conventional tubular protector disclosed in such as such as US2011/041944A1, such as
With being for example difficult to more than the well part discharge resistance quality required by the high-voltage applications of 300 kV AC nominal voltages via
Conventional orderly application on one conductive layer and the second conductive layer to support tube is to realize, because conventional orderly application is inevitably
Imply that gap forms and exists.In the mode of operation of wherein high voltage transmission line this earth electric field be highest first conductive layer and absolutely
Everywhere, it is especially important for inhibiting any formation in gap to the radial engagement of edge.
If the first conductive layer and electric insulation layer and be also the second conductive layer not only mutual close physical in preferably selecting
Connection, and be mutually each connected chemically, then the particularly advantageous embodiment of electrical tubular insulator is achievable.For example, such as
As knowing from polyethylene, being connected chemically between two adjacent layers can be realized by being crosslinked.In other words, tubulose electricity is exhausted
Edge body has the insulating layer including polymer, and at least one of the first conductive layer and the second conductive layer also include polymerization
Object.The subsequent polymer can be polymer similar or even identical with the polymer selected for electric insulation layer, example
Such as, it is able to use the same polymer that the resistivity for being lower than 500 Ω M is realized with 30 %-wt carbon blacks.
Cross-link low-density polyethylene (XMPE or PEX), synthetic rubber are able to use (for example, EP rubbers (EPR) and ternary
EP rubbers (EPDM)), silicone, softening thermoplastic (flexibilized thermoplastics) (for example, pass through such as mineral
The isotactic polypropylene (iPP) of the plasticizers softening such as oil) and other alkene thermoplastic bodies (for example, isotactic polypropylene (iPP) and third
The random and block of the various monomeric units such as alkene-ethylene copolymer (PEC) or ethylene, propylene, butadiene or styrene is total
The mixing of polymers) insulating materials.
The thickness of insulation is depending on the voltagerating of power transmission line in the mode of operation of high voltage transmission line and for squeezing absolutely
The insulating materials of the selection of edge layer.The demonstration of the electrical tubular insulator of high voltage applications with the nominal AC voltage of 300 kV is real
Applying example can have relative to the neutral geometric fibre defined by the tubulose global shape of electrical tubular insulator, survey in radial directions
Amount in 20 millimeters to 35 millimeters of range, the specifically wall thickness of the insulating layer in 25 to 35 millimeters of range.This
Sample, for the AC high voltage transmission line of the nominal voltage for example with 420 kV, the entirety of about 32 millimeters of electrical tubular insulator
Wall thickness is achievable.If electrical tubular insulator will serve as the electrical insulator of DC power transmission line, even less than 25 millis
The wall thickness of rice is achievable.If the nominal voltage of the example embodiment of transmission line is specified to be only about 50 kV AC,
Wall thickness with the insulating layer less than 20 millimeters is achievable.Skilled reader is it will be recognized that wall thickness depends on tubulose electricity
The quality of insulator.
Inside and outside semi-conductive layer can have the insulation with the high filler content containing conduction additive (for example, carbon black)
Same or similar polymer.In the case where the semi-conductive layer based on carbon black, filer content for example can be in 15-35 wt.%
In the range of.If this percentage can be shown using other high aspect ratio conductive fillers (for example, carbon nanotube, graphene)
What is write is lower, i.e., as low as 1 wt.%.The conductivity of semi-conductive layer for example can be 10-7- 10-1In the range of S/cm.Semiconductive
The typical thickness of layer is in 1-3 millimeters of range.
In one embodiment, insulation and semiconductive material are following materials:
Borealis LE4253(insulation), a kind of concentration less than 2.5 wt.% includes bis- (α, alpha-alpha-dimethyl benzyls
Base) peroxide cross-linking homopolymer.
Borealis LE0550(semiconductive), a kind of crosslinkable semiconductive power compound is { in the concentration less than 2.0 wt.%
Body modified poly ethylene comprising carbon black and [1,3(or 1,4)-penylene two (isopropyl subunit)] di-tert-butyl peroxide is copolymerized
Object }.
If be required, insulation also can include other additives of low amounts, such as antiscorching agent is (for example, 2,4- diphenyl-
4- methyl pentene -1) and antioxidant [for example, 3-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid and thiodiglycol it is double
Rouge].
Above-mentioned insulation system will allow average electric field in operation to be generally below 15 kV/mm for AC, and for DC
Generally below 20 kV/mm.Another ruleization can allow for the even as high as more high electric field of 30 kV/mm.
Since electrical tubular insulator will serve as the basic electrical isolation in high voltage transmission line, in the exemplary embodiments,
The load that there is support tube at least 80 millimeters of internal diameter to be used to that its section to be received to allow for bearing the specification according to high voltage transmission line
At least one non-insulated electric conductor section of electricity of current capacity.Term " internal diameter " also refers in the net internal diameter or maximum net of electrical tubular insulator
Diameter.The internal diameter of support tube is mainly the specified function of the expection nominal current of the minimum global sections of definition conductor.It is real in demonstration
It applies in example, the wall thickness of insulating layer may be 27 millimeters for the 420 kV AC electric currents in 5000 A, so as to cause such as 140 millis
The achievable internal diameter of a small amount of support tube of rice.
The requirement of application and flexible depending on the power transmission line to be established, the support tube of electrical tubular insulator are ripples
Pipe, for example, the bellows such as defined by reputable code ISO 10380.
Corrugated metal pipe according to by roll band formed and seam crossing weld cylinder thin-wall tube (Fig. 3 a) is made.Guan Neng
Enough annulars or spiral profile with the space depended in ripple, closure or open screw pitch, or even needing more
Omega shape profile is depended on when big flexible.
In another embodiment, support tube is so-called band around metal hose or pipe.It is pre-formed by screw winding
Continuous metal strip, so that edge interlocking is made with forming pipe.
Depending on its flexibility, band is distinguished into interlocking or loose winding (more flexible) around pipe and is fully interlocked (with making it
Closer additional trenches).Interlock profile can have various shape, and one of the most common shape is T shape, U-shaped, S-shaped or Z
Shape.For the more easily pulling for being conducive to conductor during installing at the scene, it is also able to use the liner with metal or little profile section
It is loose around pipe.In one embodiment, it is able to use the EXTRAFLEX supplied by " Universal Metal Hose " company
Rectangular locking is loosely around galvanized steel flexible pipe.
Finally, bellows and band are flexible (flexible) metal tube around metal tube.Be able to use by such as steel (304,
316,321 grades with monel metal), galvanized steel, brass, bronze, purple (red) copper and aluminium (including its any alloy) it is Bu Tong golden
Belong to the flexible metallic hose that several types are made, wherein thickness is in 0.25 to 3.50 millimeters of range.
In the case where being required, such as cotton, synthetic rubber, nitrile rubber (BUNa-N), various types of fibers or
Even the material of metal wire can be introduced in interlocking (to fill in band around certain tightness is provided during the forming process of pipe
Braiding layer (packed carcass)).In the preferred embodiment of electrical tubular insulator, there are Conductive fill materials.Suitable
Packing material is, for example, the polymer (for example, rubber) for including conductive fillers (for example, carbon black) or conductive fiber (for example, carbon fiber
Dimension).
To make electrical tubular insulator be suitble to use in high voltage transmission line, its capacity that is electrically insulated of electrical tubular insulator is this
Sample so that it be able to bear generally in AC be up to 28 kV/mm and in DC be up to 35 kV/mm maximum field level.
For several reasons, additional conductive layer can be arranged between support tube and the first conductive layer.Firstly, since with
Ripple or band are compared around pipe, because material is prevented from the space entered between two adjacent ridges of support tube, it is formed
For co-extrusion pressure and it is accordingly used in smoother surface from the more sustaining materials stream of extrusion head.Secondly, it is prevented in support tube
Two adjacent ridges between space segment or completely filled with formed the first conductive layer material.It is led in no described add
Solution in the case where electric layer is compared, and space is made to provide the smaller bending half for electrical tubular insulator without such material
Diameter.In the exemplary embodiments, by making conduction band around support tube screw winding, additional conductive layer is established.
Additional layer must be conductive, because it must lasting and reliable electricity between support tube and the first conductive layer
Connection.
If electrical tubular insulator is also by with the superior isolation attribute about humidity, selection is with these expection attributes
Additional conductive layer, allow it to serve as moisture barrier and be advantageous.
If be required, relative to longitudinal axis, at least one other layer is applied in the second conductive layer outer radial.It is described
At least one other layer can be the shielding including multiple metal wires, these metal wires can one be displaced to another ground arrangement,
Or it is interweaved to form mesh shields structure.If be required, at least one described other layer is formed as moisture barrier, gold
Belong to the mechanical protection device of sieve and such as polymeric cover.
It is used depending on expected, the several layers possible application of these other layers with different attribute pipe disclosed above
On shape electrical insulator, to authorize electrical tubular insulator and power transmission line, with additional attribute, for example for example, it to be used for EMV screen
It covers, aggressivity protection, Wear-proof.As illustrated examples, in addition layer is formed as protectiveness conductive mesh, to convey short circuit current
Or the energy of dissipation lightning strike.
General name " in addition layer " also includes for example for protecting the PE layer of the hv transmission line in underground application.Alternatively or
Additionally, for the underground application of electrical tubular insulator and power transmission line formed therewith it may require that as wire screen and/
Or PE piece, in addition semi-conductive layer and suchlike additional other layer.These layers may be established by using semi-conductive adhesive band.
For the flexibility being maintained in the installation of high voltage transmission line, electrical tubular insulator, which has to be wound on, extends transverse to longitudinal axis
The axis of bending of line (referring to above-mentioned neutral optical fiber), the bending radius in 4 to 20 times of outer diameter of electrical tubular insulator of range.One
From the aspect of transport aspect and on the other hand consider other practical aspects of such as stability, the specified range for bending radius
Indicate the bending attribute of optimization for purposes of the present invention.Possible bending radius correspond to be not used excessive power that half
Diameter winding, and deformed, in the case where crack or other defects without significant, the radius that tubulose electrical isolation can be bent to.
At the electric insulated aspect flexible stated with D:d, wherein D is bending diameter, and d is the outer of insulated wire
Diameter can reach the ratio down toward 10.
If electrical tubular insulator will also serve as the carrier of transmission signal, it can further include existing relative to longitudinal axis
The additional call wire that second conductive layer outer radial provides.It is technically less advantageous, but actually likely provide and carrying
Body pipe it is adjacent in be lower than the first conductive layer additional conductor lines.
If be required for some reason, it is also possible to provide between electrical insulator layer and inner wall surface additional
Conductor lines.In the exemplary embodiments, additional conductor lines are embedded between electrical insulator layer and the first conductive layer.In addition implementing
In example, additional conductor lines are embedded between electrical insulator layer and the second conductive layer.Although with extra conductor line wherein in conduction
Compared in the embodiment of outer layer outer radial arrangement, such embodiment can due to relative to longitudinal axis, in radial directions from
The electric field that the non-insulated electric conductor section of electricity generates less is shielded, and is being presently considered to be technically less advantageous, but such
Embodiment can still be enough to establish the secure communication line for monitoring high voltage transmission line and/or its element.
Has the advantages that such embodiment of additional conductor lines without together with the transmission of electricity individual signal wire of wire routing.
It is used depending on expected, additional conductor lines can be intended for the temperature of monitoring such as joint or for disposably permitting
Perhaps the signal wire or optical fiber of communication and high-capacity power transmission.
For manufacturing the appropriate methodology of the most basic embodiment of disclosed electrical tubular insulator earlier the following steps are included:
A) conductive carrier pipe is provided；
B) it on the direction of the longitudinal axis defined by the tubulose global shape of support tube, is fed and is carried by nozzle system
Body pipe；
C) the first conductive layer and insulating layer co-extrusion is pressed onto support tube；And
B) the second conductive layer is applied, so that insulating layer is arranged in the first conduction relative to longitudinal axis in radial directions
Between layer and the second conductive layer, and the first conductive layer is made to be electrically connected to support tube, wherein the first conductive layer is attached to electrical isolation
Layer, and wherein electric insulation layer is attached to the second conductive layer.
First conductive layer and insulating layer requirement two extruders of offer, one every layer.Except the two extruders and co-extrusion pressure
Outside nozzle system, the complete production line for electrical tubular insulator is by for handling metallic carrier pipe and heating and/or cooling area
The spare system of domain and the second conductive layer of application forms.Metallic carrier pipe can be preheated (for example, the case where insulation is XLPE
It is lower to about 100 °C) on the one hand to reduce the thermal energy of the requirement that must be shifted in subsequent crosslink part, so as to cause shorter
Crosslink part and/or higher throughput rate, and on the other hand, avoid the melt substance of the first semi-conductive layer from being quenched to carrier
In the case surface of pipe.
It is fed in corresponding extruder generally as the semiconductive and insulating compound of granular materials supply, at it
By gradually being melted when the various heating regions of production line.Then, by rotary squeezing machine screw rod come the polymer of mixed melting
Matter simultaneously makes its homogeneous.Soft easy formable melt substance is realized since temperature must be high enough so that, but due to then squeezing
Peroxide crosslinking process will start in extruder before being formed in head, and temperature must not be too high, therefore, accurate temperature control
It is crucial for making (for example, being about 130 to 135 °C for XLPE).The XLPE of melting continues directly to be expressed to flexible
In support tube, or to middle layer (for example, by simultaneously therefore forming the biography for serving as the foil of moisture barrier around support tube winding
The other semi-conductive layer that conduction band is formed) on.It, will such as moisture barrier, additional sheath and suchlike if be required
What its inner/outer extra play is taken into account, then the description of above mentioned production line even can be more complicated.
If homogeneous shielding will be realized by the second conductive layer, recommend also to be applied to the second conductive layer absolutely via extruding
In edge layer.
For example, by three layers of extruding nozzle system of three layers of extrusion head, for having several hundred kilovolts higher than such as 300 kV
Nominal voltage high voltage applications be suitble to and economic co-extrusion pressure mode is achievable.First conductive layer, insulating layer and
Second conductive layer at about generates in the time, thus allow between three above mentioned layers in sufficiently cleaning and almost
At void-free radial engagement.
In the production of ordinary power cable, the installation of three types is normal for the production line that wherein application persistently vulcanizes
See: stretched wire；Vertically and horizontally line.Complete production line length can be occupied more than 100 meters.Also turn out vertical production line pair
Method for manufacturing electrical tubular insulator according to the present invention is advantageous, because since no the earth's core power acts on tubulose electricity absolutely
Edge body so that the attribute of electrical tubular insulator be in all circumference of electrical tubular insulator it is extremely identical, therefore, it assures that
The accurate original degree of the geometric center positioning and insulating layer of metallic carrier pipe.Therefore, on the direction that centrifugal force direction extends,
Support tube is fed by co-extrusion pressure ozzle.
One or more extrusion processes ensure that electric insulation layer is not only determined by the integral tubular shape of tubulose electric insulation arrangement
The longitudinal direction of justice is seamless, and is homogeneous in a circumferential direction, this is in the long-time phase within such as several years
The use of power transmission line as conveying electric current is conclusive.
Co-extrusion process be it is lasting, thus, there is no the limitations of the theoretical length of the production section of electrical tubular insulator.Consider
It is limited to transport, contemplates segment length in 700 meters of range to be intended for the route of underground (land) power transmission line.For defeated
The seabed of electric wire is installed, due in installation point to coiling electrical tubular insulator so that the reel of transport is remote in the limitation of diametrically
Far below the limitation to the shipping on conventional highway, therefore, it can be anticipated that in the more much higher length of kilometer range.
For example, if require such as more preferably certain expected attributes of moisture protection, then it can be using additional before step b)
Conductive layer to support tube.
Often by the expected solidification for carrying out electrical tubular insulator after the extruding in step c).The step of solidification, was squeezing
It is carried out immediately after journey, referred to as continuously solidification or continuous vulcanization.For the latter, temperature is promoted (for example, right using cylindrical electrothermal furnace
It in XLPE, is promoted and arrives about 200 °C).The noble gas (nitrogen) under pressure is used during so-called solidization, it is ensured that hot homogeneous
Transfer.Typical length for heating zone is 15 to 50 meters roughly.These are followed by the cooling segment of at least equal length,
In, insulation is cooled to environment temperature with specific slow rate.
In conductor insertion process, multiple conductor segments can be bundled for example by band, metal wire or the like, so as to
Simplify insertion of the conductor segment into tubular insulator.
Test display can be filled easily using non-insulated electric conductor section in the up to 70% overall freedom of electrical tubular insulator
Portion section essentially contributes to economically establish high voltage transmission line.
It is more than at least 10000 mm using at least one conductor segment2Whole conductive cross-section area, allow for example to have respectively
There is the transmission of the continuous power of the specified AC electric current of the electric current of 5000 peaces and the nominal voltage of 420kV.It is greater than in conductive cross-section area
10000 mm2, specifically it is greater than 20000 mm2When, it is an advantage of the invention that maximally related.It even can be up to that numerical value
Twice or even five times of conductive cross-section area application the present invention.
Once after the manufacture that the upper surface of electrical tubular insulator refers to, at least one non-insulated electric conductor section of electricity is inserted into tubulose
In electrical insulator, excellent high voltage transmission line is achievable.Insertion must carry out, so that at least one conductor segment contacting pipe
The inner wall surface of shape electrical insulator so that support tube at least one conductor segment phase in the mode of operation of high-voltage power line
On same potential.
Conductor segment can be by copper, aluminium or alloy and any other suitable conduction material including any one of these elements element
Material or material composite are made.
Specifically, preferably having it in the number of turns of flexible for the long range connection established between A point and B point
In flexibility be quite high high voltage transmission line.The embodiment of high voltage transmission line has more preferably or is at least similar to conventional high-pressure function
The flexible ratio of the flexible of rate cable.Such embodiment will be for example suitable for the existing high voltage electric transmission cable of replacement.
High voltage transmission line can be used not only for establishing between point A and point B and connect over long distances at present, and therefore be formed mutually flat
The economical advantageous alternative for multiple conventional high-pressure cables that row provides, and for establishing from gas insulated transformer substation (gas
Insulated substation) first part to gas insulated transformer substation second part relatively short distance connection, for example,
For being connected electrically in two parts of the improved substation extended on the two sides of highway, or by existing structure
In different caverns or different basement be electrically connected two parts.At present therefore high voltage transmission line, which is formed, is also referred to as gas-insulated mother
The economically attractive alternative of the so-called gas-insulated line (GIL) in spool road (GIB).
In demonstration in use, high voltage transmission line can be used for replacing GIL or GIB at present.Gas-insulated line (GIL) or gas are exhausted
Edge bus duct (GIB) is aerial commonly used to connection gas-insulated switchgear and general wiring on the ground and across several hundred meters
Line, so as to cause SF6 insulating gas mixture that is a large amount of and pressurizeing.Most common voltage level for higher voltage is
420kV AC and at least 4000 amperes.Sulfur hexafluoride (SF6) is extremely strong greenhouse gases, and is therefore subjected to the regulations increased
And ban.Therefore, more and more grid operators need alternative insulation solution, to minimize pressurization SF6 insulation gas
The volume of body.It is uneconomic for majority of case that GIL/GIB, which is substituted for conventional extrusion cable, because due to high current volume
Fixed, a list GIL/GIB is replaced several normal cables using the installation that is parallel to each other are needed.
Using according to the flexible of the application and therefore high voltage transmission line flexible the advantages of be such electrical connection
It can be established in the case where the insufficient space that can be used for establishing conventional bus bar pipeline wherein will be present, for example, in existing power transformation
Stand or the offer quota of switch yard (switchyard) in the case where.
Compared with gas insulated bus pipeline, according to the flexible of the application and therefore high voltage transmission line flexible it is another
Outer advantage is not require the compensation device assembly for balancing thermal expansion.
In addition, more than common gas insulated bus pipeline according to the high voltage transmission line of all embodiments disclosed herein
Favorably, because it is without SF6, it is the mode for being easily installed (more tolerant with positional tolerance due to orienting), it is installation and dimension
The mode that shield faster (does not require gas discharge and gas-monitoring).Compared with common gas insulated bus pipeline, this all advantage
Allow to reduce for establishing the totle drilling cost that short distance is connect with the high voltage transmission line according to the application.
Additional functionality can be awarded in high voltage transmission line according to the present invention, because it further includes for transmitting signal
Auxiliary conductor, wherein auxiliary conductor is also been inserted into electrical tubular insulator.Since fill factor is far smaller than 100%, but
There are certain spaces for optionally comprising the additional functionality in insulation tube.Example embodiment as auxiliary conductor
Optical fiber can be laid side by side with non-insulated electric conductor section.That auxiliary conductor can be used for monitoring temperature in axial direction to detect
Partial discharge or any variation of the water content for observing power transmission line.Electrical insulator pipe is suitable for masking for example by strengthening
Auxiliary line/conductor made of glass optical fiber is used for communication objective extension wire.Alternatively, auxiliary conductor, which can be, is based on
The conductor of copper.Under any circumstance, auxiliary conductor can be protected against damage, and/or by the insulation of their own by
Electric protection, or from excessive electric field, if being required.
It can be in AC the or DC energy transmission system of high or moderate voltage level operation according to the high voltage transmission line of all implementation columns
It is used in system.Global function system includes following basic module:
A) at least two electrical tubular insulator section；
B) at least one power terminal.
Joint can be prefabricated joint in the case where land is installed, and be flexible in the case where seabed is installed
Or so-called factory joint.In the exemplary embodiments, power terminal can be the casing for connecting with adjacent overhead line
(bushing) connection of the gas-insulated module and to such as GIS.Joint and terminal can pass through the known cable that scales up
Joint or oil-free cable termination and realize.
Above-mentioned high voltage transmission line, which can be used in transmission, to be had higher than 1 kV, and the AC or D/C voltage of 50kV are specifically higher than.
For the nominal voltage of at least system of 320kV, the economically particularly advantageous solution compared with known power cable solution
Scheme is achievable.
Detailed description of the invention
Description has references in the attached drawing illustrated below shown, wherein
Fig. 1 is the high-voltage power line including electrical tubular insulator according to first embodiment, wherein exhausted in manufacture tubulose electricity
The non-insulated electric conductor section of multiple electricity is inserted into after edge body；
Fig. 2 is feature comprising is not filled by the mutual lock strap of profile around the first embodiment of the support tube of form of tubes to have
Section (sectional breakout)；
Fig. 3 be to be formed with have filling profile mutual lock strap around form of tubes carrier first embodiment variation second
The detailed feature of embodiment；
Fig. 4 is with the 3rd embodiment of the support tube of bellows fashion；
Fig. 5 is feature comprising the section of the first manufacturing method of high-voltage power line；
Fig. 6 is feature comprising the section of the second manufacturing method of high-voltage power line；
Fig. 7 is the other embodiment of the high-voltage power line in the broken away views of part；And
Fig. 8 is by the cross section view according to the wall of the additional embodiment of the high-voltage power line of Fig. 7.
Same section, electric current and voltage give identical reference character in the figure.
Specific embodiment
High voltage transmission line 14 shown in Fig. 1 includes electrical tubular insulator 1 and 7 including being used for transmission high-voltage power load
The first embodiment of the nominal conductor of a non-insulated electric conductor element 2 of electricity.The display of the element of power transmission line 14 shown in Fig. 1 does not exist
It in single section, but is shown in an interleaved manner relative to longitudinal axis 3, during longitudinal axis is further also referred to as in the disclosure
Property optical fiber, and it is defined and unrelated with its bending radius by the tubulose monnolithic case of electrical tubular insulator 1.Section is staggeredly shown
Show the setting for allowing to more fully understand high voltage transmission line 14.
Electrical tubular insulator 1 includes to be flexible carrier in its number of turns lateral to the flexible of longitudinal axis 3
Pipe 4, wherein bending radius is about 20 times of the outer diameter 12 of electrical tubular insulator 1.
One group of three pantostrat groups co-extrusion pressure in support tube 4.The layer group includes by the first conductive layer 5, electric insulation layer 6
With the conductive carrier pipe 4 of the second conductive layer 7 covering.First conductive layer 5, insulating layer 6 and conductive layer 7 have three layers of extruding co-extrusion pressure
To support tube 4, so that insulating layer 6 is led with second relative to longitudinal axis 3, being arranged in the first conductive layer 5 in radial directions
Between electric layer 7.First conductive layer 5 is in electrical contact with support tube 4 in radial directions relative to axis 3.
Alternatively and therefore it is shown in phantom, for transmitting the auxiliary conductor 30 and the non-insulated electric conductor element 2 of electricity of signal
It is inserted into electrical tubular insulator 1 together.
Fig. 2 is feature comprising is not filled by wheel when checking in the part longitudinal section shown in the left part of Fig. 2 to have
Exterior feature, the section of the first embodiment of the support tube for 4 form of interlocking circular tube being made of stainless steel.Due to load shown in Figure 2
The upper and lower part of body pipe is not that just therefore half has drawn profile tangent in Fig. 2 herein.For simplicity, the tangent line
Also it is marked with reference number 3.
Reader it is noted that the wall of the first embodiment of support tube 4 shown in part 15 section, so as to recognize with
Its uniqueness setting that design variation shown in Fig. 3 is compared, as explained below.
Fig. 3 is the detailed feature of the second embodiment of support tube 40, be formed in above with respect to Fig. 2 shows and explain
Same section 15 in have filling profile mutual lock strap around form of tubes support tube 4 first embodiment variation.It is stainless
The filling 16 of steel support tube 40 is realized by rubber (with black display in Fig. 3).The filling 6 includes that carbon black is filled out as conduction
Material.
The 3rd embodiment of support tube is shown in Fig. 4.Support tube 400 is the bellows being made of stainless steel.
Fig. 5 show the feature of three layers of extrusion head 13 and in vertical production line during its manufacturing process electrical tubular insulator
4 first embodiment, wherein squeeze stream in direction identical with gravitational direction, i.e., with the feeder as support tube 4
It is upwardly extended to the side of 21 identical axis 3.In the left side of axis 3, all members of electrical tubular insulator 1 and three layers of extrusion head 13
Element is shown in cross section, and identical element is shown in the plan view on 3 right side of axis.Three layers of extrusion process are for realizing in layer
5, the excellent joint quality required in terms of impurity and gap between 6,7 is for example established suitable for conveying more than 300kV
Nominal voltage reliable high voltage transmission line it is required as.
Three layers of extrusion head 13 include being respectively dedicated to squeeze the first conductive layer 5, the second electric insulation layer 6 and the second conductive layer 7
The first ozzle 17, the second ozzle 18 and third ozzle 19.For being distributed the first conductive layer 5 of formation, electric insulation layer 6 and second is led
The feed direction of first melt substance 22 of electric layer 7, the second melt substance 23 and third melt substance 24 is indicated by an arrow.
In this embodiment of manufacturing method, allow the entrance of the first conductive layer 5 at two of support tube 4 to a certain extent
Spiral slit 20 between adjacent windings.
Fig. 6 shows the second implementation of the feature and electrical tubular insulator 10 of three layers of extrusion head 13 during its manufacturing process
Example.Second manufacturing process is similar to the process for showing and describing referring to Fig. 5.Therefore, it will only describe and show and describe referring to Fig. 5
Manufacturing method difference.Entirety or the identical element of function be given in Fig. 6 such as with reference number identical in Fig. 5.
Manufacturing method shown in Fig. 6, which is included in, is inserted into three layers of extrusion head 13 preceding answered for additional conductive layer 8
Use the additional step in support tube 4.By winding in a roll-up direction, so that two neighboring edges of belt are overlapped, execute
The conduction for forming the additional semi-conductive layer takes application on the outer surface of support tube 4 to.
Different from electrical tubular insulator 1, the gap 20 of electrical tubular insulator 10 is not penetrated by the material of the first conductive layer 5,
Because additional conductive layer 8 forms the barrier of the stream of melt substance 22.Keep 20 nothing of spiral slit between two adjacent windings
Any melt substance 22 for forming the first conductive layer 5 authorizes electrical tubular insulator 10 and 1 phase of electrical tubular insulator explained above
Than more preferably bending attribute.
It note that using bellows 400 rather than support tube 4 or support tube 40 are also possible.
Fig. 7 shows the additional embodiment in part broken away views medium-high voltage transmission lines 100 together with Fig. 8.Similarly, carrier
Pipe 4 receives the one group of pantostrat 5,6,7 applied by co-extrusion pressure as explained above.This embodiment of high voltage transmission line 100 includes
Other layer 9 in the form of wire shield 9 comprising the multiple copper metal lines and formation jacket layer extended spirally around axis 3
The poly- second that (jacket layer) uses to the underground for being embedded in high voltage transmission line in soil suitable for its medium-high voltage transmission lines
Alkene layer.
Alternatively and therefore it is shown in phantom, provides and be used in 7 outer radial of the second conductive layer relative to longitudinal axis
Transmit the additional conductor lines 29 of signal.These other layers 9 are applied after mutual continuous three layers of extrusion process.
Label list
1,10,100 electrical tubular insulator
2. electric conductor section
3. longitudinal axis
4,40,400, support tubes
5. the first conductive layer
6. electric insulation layer
7. the second conductive layer
8. additional conductive layer
9. other layer (for for example covering, the general name of protective metal shell, jacket layer, wire shielding)
11. PE layers
12. the outer diameter of electrical tubular insulator
13. squeezing nozzle system/co-extrusion head/tri- layer extrusion head
14. high voltage transmission line
15. the part of support tube
16. filling
17. the first ozzle
18. the second ozzle
19. third ozzle
20. gap
21. feed direction
22. the first melt substance
23. the second melt substance
24. third melt substance
26. the coiling direction of belt 8
27. PE layers
28. wire shield
29. additional conductor lines
30. auxiliary conductor line
Claims (29)
1. a kind of electrical tubular insulator (1,10,100), the electrical tubular insulator (1,10,100) is for receiving electricity not insulate
Electric conductor (2), so that forming high voltage transmission line, it is characterised in that the electrical tubular insulator (1,10,100) is along whole by its tubulose
The longitudinal axis (3) that shape defines be flexible with it is flexible, and
It includes the conductive carrier pipe (4) covered by the first conductive layer (5), electric insulation layer (6) and the second conductive layer (7),
A) wherein first conductive layer (5) and the insulating layer (6) co-extrusion be pressed on the support tube (4,40,400) and
Wherein the support tube (4,40,400) is designed to be exposed permanently to AC or DC electric current；And
B) wherein the insulating layer (6) outer radial apply second conductive layer (7) so that the insulating layer (6) relative to
The longitudinal axis (3) is arranged in radial directions between first conductive layer (5) and second conductive layer (7), and
And first conductive layer (5) is made to be electrically connected to the support tube (4), wherein first conductive layer is attached to the electrical isolation
Layer, and wherein the electric insulation layer is attached to second conductive layer, and
C) wherein additional conductive layer (8) is arranged between the support tube (4) and first conductive layer (5).
2. electrical tubular insulator (1,10,100) as described in claim 1, it is characterised in that second conductive layer (7) is in institute
It states and is extruded on insulating layer (6).
3. electrical tubular insulator (1,10,100) as claimed in claim 2, it is characterised in that first conductive layer (5), institute
State insulating layer (6) and second conductive layer (7) via three layers squeeze and co-extrusion is pressed onto the support tube (4,40,400).
4. the electrical tubular insulator (1,10,100) as described in any one of claims 1 to 3, it is characterised in that the insulation
Layer (6) includes polymer, and at least one of first conductive layer (5) and second conductive layer (7) also include poly-
Close object.
5. the electrical tubular insulator (1,10,100) as described in any one of claim 1-3, it is characterised in that described first
At least one of conductive layer (5) and second conductive layer (7) include semiconductive material.
6. the electrical tubular insulator as described in any one of claim 1-3, it is characterised in that the support tube (400) is wave
Line pipe.
7. the electrical tubular insulator (1,10,100) as described in any one of claim 1-3, it is characterised in that the carrier
Managing (4,40) is band around pipe.
8. the electrical tubular insulator (1,10,100) as described in any one of claim 1-3, it is characterised in that the carrier
Pipe (4,40) is interlocking around pipe (4).
9. electrical tubular insulator (1,10,100) as claimed in claim 7, it is characterised in that the band is filled around pipe, so that
The inside of the support tube (4) is isolated from the outside relative to the longitudinal axis (3) described in the radial direction.
10. the electrical tubular insulator (1,10,100) as described in any one of claim 1-3, it is characterised in that the tubulose
The electrical isolation capacity of electrical insulator allows it to bear to be up to 25 kV/mm in AC and is up to the flat of 35 kV/mm in DC
Equal electric field level.
11. electrical tubular insulator (10) as described in claim 1, it is characterised in that form the additional conductive layer (8), make
It obtains it and potentially acts as moisture barrier.
12. the electrical tubular insulator (100) as described in any one of claim 1-3, it is characterised in that relative to described vertical
At least one other layer (9,11) is applied in the second conductive layer outer radial to axis (3).
13. electrical tubular insulator (1,10,100) as claimed in claim 12, it is characterised in that at least one is another described in being formed
Outer layer (9,11), allows it to serve as moisture barrier.
14. the electrical tubular insulator (1,10,100) as described in any one of claim 1-3, it is characterised in that it have around
Extend transverse to 4 to the 20 of the outer diameter (12) in the electrical tubular insulator of the axis of bending of the longitudinal axis (3)
Bending radius in range again.
15. the electrical tubular insulator (1,10,100) as described in any one of claim 1-3, it is characterised in that relative to institute
It states longitudinal axis (3) and provides additional conductor lines (29) in the second conductive layer (7) outer radial.
16. the electrical tubular insulator (1,10,100) as described in any one of claims 1 to 3, it is characterised in that relative to
The longitudinal axis (3) radially provides additional lead between first conductive layer (7) and the support tube (4,40,400)
Body line (29).
17. one kind for manufacture will in the method for electrical tubular insulator used in high voltage transmission line (1,10,100), including with
Lower step
A) conductive carrier pipe (4,40,400) are provided, is designed to be exposed permanently to AC or DC electric current；
B) additional conductive layer (8) is applied on the support tube (4,40,400)；
C) on the direction for the longitudinal axis (3) that the tubulose global shape by the support tube (4,40,400) defines, by squeezing
Nozzle system (13) are pressed to feed the support tube (4,40,400)；
D) the first conductive layer (5) and insulating layer (6) co-extrusion are pressed on the support tube (4,40,400)；
E) the second conductive layer (7) are applied, so that the insulating layer (6) is relative to the longitudinal axis (3) cloth in radial directions
It sets between first conductive layer (5) and second conductive layer (7),
And first conductive layer (5) is made to be electrically connected to the support tube (4,40,400), wherein first conductive layer
It is attached to the electric insulation layer, and wherein the electric insulation layer is attached to second conductive layer.
18. method as claimed in claim 17, it is characterised in that by the way that second conductive layer (7) is expressed to the insulation
Step (d) is executed on layer (6).
19. method as claimed in claim 18, it is characterised in that by by first conductive layer (5), the insulating layer (6)
With second conductive layer (7) via three layers squeeze and co-extrusion be pressed on the support tube (4,40,400) execute step d) and
e)。
20. the method as described in any one of claim 17 to 19, it is characterised in that in the side that centrifugal force direction extends
Upwards, the support tube (4,40,400) is fed by the extruding nozzle system (13).
21. the method as described in any one of claim 17 to 19, it is characterised in that the electrical tubular insulator is such as power
Benefit require any one of 1 to 16 described in electrical tubular insulator (1,10,100).
22. the method as described in any one of claim 17 to 19, it is characterised in that after the extruding in step c), solidification
The electrical tubular insulator (1,10,100).
23. a kind of high voltage transmission line (14), including as described in any one of claims 1 to 16 electrical tubular insulator (1,
10,100) and at least one non-insulated electric conductor section (2) of electricity, at least one described non-insulated electric conductor section (2) of electricity are electric in the tubulose
It is inserted into the electrical tubular insulator (1,10,100) after insulator (1,10,100) manufacture, so that at least one described conductor
Section (2) contacts the inner wall surface of the electrical tubular insulator (1,10,100), so that the support tube (4,40,400) is in high pressure
In the mode of operation of power line (14) in at least one described identical potential of conductor segment (2), wherein the support tube
(4,40,400) it is designed to be exposed permanently to AC or DC electric current.
24. high voltage transmission line (14) as claimed in claim 23, it is characterised in that its flexible ratio allows it to use
Make high voltage electric transmission cable.
25. high voltage transmission line (14) as claimed in claim 23, it is characterised in that it has around extending transverse to the longitudinal direction
Bending radius in 4 to 20 times of range of the outer diameter (12) in the electrical tubular insulator of the axis of bending of axis (3).
26. high voltage transmission line (14) as claimed in claim 23, it is characterised in that
At least two electrical tubular insulators (1,10,100) as described in any one of claims 1 to 16, wherein at least one
A non-insulated electric conductor section (2) of electricity is inserted into, so that at least one described conductor segment (2) contact electrical tubular insulator (1,10,
100) inner wall surface so that the support tube (4,40,400) in the mode of operation of the high-voltage power line (14) in
On at least one described non-each identical potential of insulated electric conductor section (2) of electricity, and
For connecting at least one described non-insulated electric conductor section (2) of electricity and being used for relative to the longitudinal axis in radial direction
On the end of two adjacent tubular electrical insulators (1,10,100) make joint connection electrical isolation the joint,
And at least one power terminal for connecting the high voltage transmission line (14).
27. high voltage transmission line (14) as claimed in claim 23, it is characterised in that for transmitting the auxiliary conductor (30) of signal,
Wherein the auxiliary conductor (30) is also been inserted into the electrical tubular insulator (1；10；100) in.
28. a kind of purposes of the high voltage transmission line (14) as described in any one of claim 23 to 27, is used to transmit tool
There are the AC or DC electric current higher than 1kV.
29. the purposes of high voltage transmission line (14) as claimed in claim 28 is used to transmit the AC or DC having higher than 50kV
Electric current.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2014/066004 WO2016012050A1 (en) | 2014-07-25 | 2014-07-25 | Tubular electrical insulator for a high voltage power transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107078492A CN107078492A (en) | 2017-08-18 |
| CN107078492B true CN107078492B (en) | 2019-07-16 |
Family
ID=51224954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480080848.8A Expired - Fee Related CN107078492B (en) | 2014-07-25 | 2014-07-25 | Electrical tubular insulator for high voltage transmission line |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3172809A1 (en) |
| CN (1) | CN107078492B (en) |
| WO (1) | WO2016012050A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017210088A1 (en) * | 2017-06-15 | 2018-12-20 | Siemens Aktiengesellschaft | Method of making a cable connection |
| CN109473938B (en) * | 2018-09-06 | 2023-12-15 | 国网浙江慈溪市供电有限公司 | Push-pull type folding cable trench cover plate |
| SE543113C2 (en) * | 2019-02-11 | 2020-10-06 | Hm Power Ab | Elastic tubular high-voltage insulating body |
| DE102020121723A1 (en) * | 2020-08-19 | 2022-02-24 | Lisa Dräxlmaier GmbH | HIGH VOLTAGE CABLE AND HIGH VOLTAGE SYSTEM |
| CN112531601A (en) * | 2020-12-22 | 2021-03-19 | 南京特塑复合材料有限公司 | Composite material cable conduit |
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-
2014
- 2014-07-25 WO PCT/EP2014/066004 patent/WO2016012050A1/en active Application Filing
- 2014-07-25 CN CN201480080848.8A patent/CN107078492B/en not_active Expired - Fee Related
- 2014-07-25 EP EP14742536.7A patent/EP3172809A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1292078A (en) * | 1961-06-13 | 1962-04-27 | Thomson Houston Comp Francaise | Improvements in the manufacture of electric cables |
| US3202754A (en) * | 1962-03-07 | 1965-08-24 | Anaconda Wire & Cable Co | Combined duct and electric cable |
| US5413147A (en) * | 1993-04-29 | 1995-05-09 | Parker-Hannifin Corporation | Flexible hose and fitting assembly |
| GB2424935A (en) * | 2004-03-26 | 2006-10-11 | Hitachi Metals Ltd | Flexible pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016012050A1 (en) | 2016-01-28 |
| EP3172809A1 (en) | 2017-05-31 |
| CN107078492A (en) | 2017-08-18 |
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